19,Jul 2024
0 Comment
Flanges for pipes are a common method of pipe connections. The gasket, bolts, and pipe flange are the three essential components of these couplings. They work with different kinds of media, pressure levels, and industries. Flanges may join components such as valves, containers, and tanks, or they can join pipes within a system. They maintain pressure and flow while providing a direct connection. This page examines the most widely used varieties of pipe flanges, as well as their applications and customary locations.
How do pipe flanges work?
Flanges are used to connect pipes, valves, fittings, and pressure parts together in the plumbing system. Gaskets between the two components prevent leaks from happening while bolts hold them together. A threaded connection, a weld, or a stub-end may be used to join the pipe to the flange.
Standard Pipe Flange Types
The male thread on a pipe and the female thread within the flange are used to connect threaded flanges. Although welding is typically not necessary, it may strengthen the connection. To stop leaks in non-welded areas, use liquid sealant or thread tape. For low-pressure and low-temperature applications, such as compressed air and water, these flanges are perfect. They are required in places where welding is risky, and there is a high risk of explosions, such as gas stations.
For welding to a pipe, a welding neck flange has a long, tapered hub. With its unrestricted flow and usage in high-pressure applications at both high and low temperatures, it reduces turbulence, erosion, and corrosion problems. To support the whole weight, a full penetration V-shaped butt weld joins the pipe and flange.
Comparable to welding neck flanges, but with the neck extended and not tapered, serving as an extension of the bore. Used in high-temperature, high-pressure applications such as those in the petrochemical, oil, and gas sectors. Water mains and industry pipe systems employ these flanges because they can sustain greater pressures.
With the exception of the internal thread, slip-on flanges resemble threaded flanges. Two fillet welds, one inside and one outside the flange, hold the pipe in place. Prior to welding into position, the pipe glides into the flange.
Mostly used for high-pressure, small-diameter pipes. A strong fillet weld outside the socket holds the pipe in place as it slides into the flange. These flanges are not appropriate for very corrosive locations because an expansion space between the pipe end and shoulder is required to prevent crevice corrosion.
In pipes made of nickel alloy or stainless steel, lap joint flanges reduce the cost of connections. The flange itself may be made of less expensive material, such as carbon steel, as it is always used with stub ends, which match the pipe system. For added robustness, the pipe may be butt-welded into place.
Blind flanges make pipelines simple to access for maintenance by sealing or closing them. Mounted against these are face-type, flat joints.
Different Types of Flanges
Typical Materials for Pipe Flanges
Flanges made of carbon steel offer superior mechanical and chemical qualities. They provide excellent chemical resistance, high toughness, high strength, and outstanding fatigue strength. They are perfect for joining pipes since they also have a high resistance to stress corrosion cracking.
Compared to carbon steel, alloy steel has greater concentrations of molybdenum and chromium. It is thus perfect for applications involving high pressure and high temperature. Moreover, it resists corrosion better than carbon steel.
As duplex steels combine the qualities of ferrite and austenite, they are more corrosion-resistant in sulfur and chloride conditions and more stiff than ferritic steel. It is appropriate for a wide range of intricate industrial applications due to its magnetic qualities.
Stainless steel is more resistant to corrosion because it includes molybdenum (Mo), chromium (Cr), and nickel (Ni). Making pipe flanges of diverse shapes and sizes is a common use. See our comparison of 304 and 316 stainless steel for further information on stainless steel.
The unique features of nickel alloy grades such as Inconel, Incoloy, Hastelloy, and Monel make them useful for specialized applications. See our article on chemical resistance for more information on the chemical characteristics of these materials.
+86-15727821389
Tel: +86-15727821389
+86-15858538689
Address: 620 Kongo Mingzhu Road, Yongxing Street, Longwan District, Wenzhou City, Zhejiang Province, China.
